Measurements results

AN4415

12/30

DocID025612 Rev 1

3.2

Output voltage ripple

Above measurement are referred to the output voltage ripple (around 30 mV in full load

condition). A ripple voltage comparison has been done replacing a 0.33

H inductor on the

L4 position with a resistor R47 = 0

. The output voltage ripple, as shown in Figure 7, is

around 100 mV in full load condition.

Figure 5. Ripple 3.3 V at 3 A

Figure 6. Ripple 3.3 V at 1.5 A

CH2: output voltage

CH3: output current

CH2: output voltage

CH3: output current

Figure 7. Ripple 3.3 V at 3 A removing L4 filter Figure 8. Ripple 3.3 V at 1.5 A removing L4 filter

CH2: output voltage

CH3: output current

CH2: output voltage

CH3: output current